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...Sequelize v5 was released on March 13, 2019. Official TypeScript typings are now included. Sequelize can be used since the beginning in order to automate the creation of every table in your database. Models are the essence of Sequelize. A model is an abstraction that represents a table in your database. In Sequelize, it is a class that extends Model. The model tells Sequelize several things about the entity it represents, such as the name of the table in the database and which columns it has (and their data types).

...Create Model associations, find, check, create and remove. Define custom validations (several builtin validations, check instance properties before saving - see enforce for details). Model instance caching and integrity (table rows fetched twice are the same object, changes to one change all). Plugins: MySQL FTS , Pagination , Transaction, Timestamps, Migrations. A Model is an abstraction over one or more database tables. Models support associations. The name of the model is assumed to match the table name. Models can be in separate modules. Simply ensure that the module holding the models uses module.exports to publish a function that accepts the database connection, then load your models however you like.